Receptor-mediated endocytosis as a route of gene delivery shows promise as it is a natural cellular process and allows targeting of ligands to specific cells. A carrier system consisting of two important components: a targetable ligand,...

steps required to represent the knot as a polygon in the cubic lattice. Several lower bounds for the lattice step numbers of different knots have been obtained by computer simulations but the exact value of the lattice step number seems to be ...